Question
If the cathode–anode potential difference in an X-ray tube be 105 V, then the maximum energy of X-ray photon can be
| (a) 105 J | (b) 105 MeV | (c) 10–1 MeV | (d) 105 KeV |
If the cathode–anode potential difference in an X-ray tube be 105 V, then the maximum energy of X-ray photon can be
| (a) 105 J | (b) 105 MeV | (c) 10–1 MeV | (d) 105 KeV |
(c) 10–1 MeV
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Two point charges 3 × 10–6 C and 8 × 10–6 C repel each other by a force of 6 × 10–3 N. If each of them is given an additional charge – 6 × 106 C, the force between them will be
|
(a) 2.4 × 10–3 N (attractive) |
(b) 2.4 × 10–9 N (attractive) |
|
(c) 1.5 × 10–3 N (repulsive) |
(d) 1.5 × 10–3 N (attractive) |
In a Young’s double slit experiment, the slit separation is 0.2 cm, the distance between the screen and slit is 1m. Wavelength of the light used is 5000 Å. The distance between two consecutive dark fringes (in mm) is
|
(a) 0.25 |
(b) 0.26 |
(c) 0.27 |
(d) 0.28 |
The electric field due to an electric dipole at a distance r from its centre in axial position is E. If the dipole is rotated through an angle of 90° about its perpendicular axis, the electric field at the same point will be
|
(a) E |
(b) E/4 |
(c) E/2 |
(d) 2E |